Develop smart php knowledge accumulation-PHP Tutorial-php.cn

Develop smart php knowledge accumulation
WBOY
Release： 2016-07-29 09:14:19
Original
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<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" c/html; charset=UTF-8">
<title>Insert title here</title>
<script language="javascript" type="text/javascript">
function AddInput(){
	var input=document.createElement('input');//创建一个input节点
	var br=document.createElement('br');//创建一个br节点
	input.setAttribute('type','file');//设置input节点type属性为file
	input.setAttribute('name','files[]');//设置input节点name属性为files[]，以 数组的方式传递给服务器端
	document.myForm.appendChild(br);//把节点添加到form1表单中
	document.myForm.appendChild(input);
}
</script>
</head>
<body>
<?php
/*
 * 尊重作者：mckee 来自www.phpddt.com
 * 可同时处理用户多个<strong>上传文件</strong>。效验文件有效性后存储至指定目录。
 * 可返回<strong>上传文件</strong>的相关有用信息供其它程序使用。（如文件名、类型、大小、保存路径）
 */
class UploadFile {
 
 protected  $user_post_file = array();  //用户上传的文件
 protected $save_file_path;    //存放用户<strong>上传文件</strong>的路径
 protected $max_file_size;     //文件最大尺寸
 protected $last_error;     //记录最后一次出错信息
 //默认允许用户上传的文件类型
 protected $allow_type = array(&#39;gif&#39;, &#39;jpg&#39;, &#39;png&#39;, &#39;zip&#39;, &#39;rar&#39;, &#39;txt&#39;, &#39;doc&#39;, &#39;pdf&#39;,&#39;docx&#39;);
 protected $final_file_path;  //最终保存的文件名
 protected $save_info = array(); //返回一组有用信息，用于提示用户。
 
 /**
  * 构造函数
  */
 function __construct($file, $path, $size = 2097152, $type = &#39;&#39;) {
	$this->user_post_file = $file;
	if(!is_dir($path)){ //存储路径文件不存在就创建
		mkdir($path);
		<strong>chmod</strong>($path,0777);
	}
	$this->save_file_path = $path;
	$this->max_file_size = $size;  //如果用户不填写文件大小，则默认为2M.
	if ($type != '')
		$this->allow_type = $type;
}
 
 /**
  * 存储用户<strong>上传文件</strong>，检验合法性通过后，存储至指定位置。
  */
 function upload() {
  
  for ($i = 0; $i < count($this->user_post_file['name']); $i++) {
   //如果当前文件上传功能，则执行下一步。
   if ($this->user_post_file['error'][$i] == 0) {
    //取当前文件名、临时文件名、大小、扩展名，后面将用到。
    $name = $this->user_post_file['name'][$i];
    $tmpname = $this->user_post_file['tmp_name'][$i];
    $size = $this->user_post_file['size'][$i];
    $mime_type = $this->user_post_file['type'][$i];
    $type = $this->getFileExt($this->user_post_file['name'][$i]);
    //检测当前<strong>上传文件</strong>大小是否合法。
    if (!$this->checkSize($size)) {
     $this->last_error = "The file size is too big. File name is: ".$name;
     $this->halt($this->last_error);
     continue;
    }
    //检测当前<strong>上传文件</strong>扩展名是否合法。
    if (!$this->checkType($type)) {
     $this->last_error = "Unallowable file type: .".$type." File name is: ".$name;
     $this->halt($this->last_error);
     continue;
    }
    //检测当前<strong>上传文件</strong>是否非法提交。
    if(!is_uploaded_file($tmpname)) {
     $this->last_error = "Invalid post file method. File name is: ".$name;
     $this->halt($this->last_error);
     continue;
    }
    //移动文件后，重命名文件用。
    $basename = $this->getBaseName($name, ".".$type);
    //为防止文件名乱码
    $basename = iconv("UTF-8","gb2312", $basename);
    //移动后的文件名
    $saveas = $basename.time().".".$type;
    //组合新文件名再存到指定目录下，格式：存储路径 + 文件名 + 时间 + 扩展名
    $this->final_file_path = $this->save_file_path."/".$saveas;
    if(!move_uploaded_file($tmpname, $this->final_file_path)) {
     $this->last_error = $this->user_post_file['error'][$i];
     $this->halt($this->last_error);
     continue;
    }
    //存储当前文件的有关信息，以便其它程序调用。
    $this->save_info[] =  array("name" => $name, "type" => $type,
           "mime_type" => $mime_type,
                             "size" => $size, "saveas" => $saveas,
                             "path" => $this->final_file_path);
   }
  }
  return count($this->save_info); //返回上传成功的文件数目
 }
 
 /**
  * 返回一些有用的信息，以便用于其它地方。
  */
 function getSaveInfo() {
  return $this->save_info;
 }
 
 /**
  * 检测用户提交文件大小是否合法
  */
 function checkSize($size) {
  if ($size > $this->max_file_size) {
   return false;
  }
  else {
   return true;
  }
 }
 
 /**
  * 检测用户提交文件类型是否合法
  */
 function checkType($extension) {
  foreach ($this->allow_type as $type) {
   if (strcasecmp($extension , $type) == 0)
    return true;
  }
  return false;
 }
 
 /**
  * 显示出错信息
  */
 function halt($msg) {
  printf("<b><UploadFile Error:></b> %s <br>\n", $msg);
 }
 
 /**
  * 取文件扩展名
  */
 function getFileExt($filename) {
  $stuff = pathinfo($filename);
  return $stuff['extension'];
 }
 /**
  * 取给定文件文件名，不包括扩展名。
  */
 function getBaseName($filename, $type) {
  $basename = basename($filename, $type);
  return $basename;
 }
}
 
 
if (!empty($_POST['submit'])) {
 $upload = new UploadFile($_FILES['files'], './tmp');
 //上传用户文件，返回int值，为上传成功的文件个数。
 $num = $upload->upload();
 if ($num != 0) {
  echo "上传成功<br>";
  echo $num."个文件上传成功";
 }
 else {
  echo "上传失败<br>";
 }
}
?>
<form name="myForm" enctype="multipart/form-data" method="POST" action="">
<input type="file" name="files[]">
<input type="submit" name="submit" value="上传"><a href="#" /a>
</form>
</body>
</html>
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The above has introduced the knowledge accumulation of developing smarty php, including uploading files and chmod. I hope it will be helpful to friends who are interested in PHP tutorials.